Monophyly and taxonomy of the Neotropical seasonal killifish genus Leptolebias (Teleostei: Aplocheiloidei: Rivulidae), with the description of a new genus
Author
Costa, Wilson J. E. M.
text
Zoological Journal of the Linnean Society
2008
2008-05-31
153
1
147
160
https://academic.oup.com/zoolinnean/article-lookup/doi/10.1111/j.1096-3642.2008.00380.x
journal article
10.1111/j.1096-3642.2008.00380.x
0024-4082
10114827
LEPTOLEBIAS OPALESCENS
(
MYERS, 1942
)
Cynopoecilus fluminensis
Faria & Muller, 1937: 99
[name suppressed for purposes of priority, and placed on
Official Index
&
Opinion
1762; type locality: Estado do
Rio de Janeiro
, in small ponds in shady places near streams, containing abundant water during the winter, but drying out completely in the dry season (temporary pools close to the old road Rio-Petrópolis, near Imbariê,
Município de Duque de Caxias
,
Estrela river
drainage,
Guanabara bay
basin, Estado do
Rio de Janeiro
, about
22°37′S
,
43°12′W
);
syntypes
lost).
Cynolebias opalescens
Myers, 1942: 107
[type locality: water holes or ponds along base of the
Serra do Petropolis
(serra
de Petrópolis
) (temporary pools close to the old road
Rio-Petrópolis
, near
Imbariê
,
Município de Duque de Caxias
,
Estrela river
drainage,
Guanabara bay
basin, about
22°37′S
,
43°12′W
),
State
of
Rio de Janeiro
,
Brazil
;
holotype
, CAS (SU) 36521].
Cynolebias nanus
Cruz & Peixoto, 1983: 90
[type locality: right side of the road between the villages of
Cava
and
Tinguá
,
22°38′S
,
43°25′W
, approximately
8 km
from the first village (
Iguaçú river
drainage,
Guanabara bay
basin),
Município de Nova Iguaçu
,
Estado
do
Rio de Janeiro
(
Brazil
);
holotype
,
MNRJ 10621
).
Material examined:
Brazil
,
Rio de Janeiro
:
CAS
(
SU
) 36522,
six paratypes
;
MNRJ 11301
,
3
; base of serra de
Petrópolis
;
MNRJ 10621
,
holotype
of
C. nanus
, 20.3-mm SL
,
MNRJ 10622
,
1
,
MZUSP 25229
/30,
two paratypes
of
C. nanus
; road
between Cava and Tinguá
, about
8 km
from
Cava
,
Nova Iguaçu
.
Diagnosis:
Distinguished from all congeners, except
L. citrinipinnis
, in having dorsal-fin origin in vertical between base of seventh and ninth anal-fin rays (vs. between base of second and sixth anal-fin rays). It differs from
L. citrinipinnis
by having caudal fin lanceolate (vs. elliptical), dark-red stripe on distal margin of dorsal and anal fins, and dorsal and ventral margin of caudal fin in males (vs. reddish brown pigmentation diffuse).
Remarks:
Redescribed by Costa & Lacerda (1988).
Distribution:
Estrela and Iguaçu river basins, both draining into Guanabara bay,
Rio de Janeiro state
, south-eastern
Brazil
(
Fig. 5
).
Habitat and conservation:
Not collected since 1981, so possibly extinct. Its area of occurrence was formerly occupied by dense rainforest, but is now highly urbanized.
Leptolebias opalescens
was collected both in open vegetation and in forest borders, sometimes sympatric to
L. splendens
and
L. marmoratus
.